//
//  CZEmoticon.swift
//  EmoticonsDemo
//
//  Created by Summer on 2017/12/19.
//  Copyright © 2017年 Summer. All rights reserved.
//

import UIKit
import YYModel

@objcMembers
/// 表情模型
class CZEmoticon: NSObject {
    
    /// 表情类型，false - 图片表情/true - emoji
    var type = false
    
    /// 表情字符串，用于发送给新浪微博服务器（节约流量）
    var chs: String?
    
    /// 表情图片名称，用于本地图文混排
    var png: String?
    
    /// emoji 的十六进制编码
    var code: String?
    
    /// 表情模型所在的目录
    var directory: String?
    
    /// 图片表情对应的图像（计算型属性）
    var image: UIImage? {
        
        // emoji
        if type {
            return nil
        }
        
        guard let directory = directory,
            let png = png,
            let path = Bundle.main.path(forResource: "HMEmoticon.bundle", ofType: nil),
            let bundle = Bundle(path: path) else {
                return nil
        }
        
        return UIImage(named: "\(directory)/\(png)", in: bundle, compatibleWith: nil)
    }
    
    /// 将当前的图像转换生成图片的属性文本
    func imageText(font: UIFont) -> NSAttributedString {
        
        // 判断图像是否存在
        guard let image = image else {
            return NSAttributedString(string: "")
        }
        
        let attachment = NSTextAttachment()
        attachment.image = image
        let height = font.lineHeight
        attachment.bounds = CGRect(x: 0, y: -4, width: height, height: height)
        
        return NSAttributedString(attachment: attachment)
    }
    
    override var description: String {
        return yy_modelDescription()
    }
}
